What a Filling Costs

Most fillings in the United States cost somewhere between about $150 and $450. A small, single surface filling sits at the bottom of that range and a large one wrapping around several surfaces of a back tooth sits at the top. As with all dental fees, the figure varies by city, by practice and by the tooth in question.

The word filling covers a lot of ground, which is why the same tooth can be quoted at different numbers in two offices. The size of the repair, the material and the insurance arrangement between you and each practice explain nearly all of the gap.

Fillings are priced by surfaces, not by teeth

Every tooth has several surfaces: the biting top, the side facing the cheek, the side facing the tongue, and the two sides touching the neighboring teeth. A filling is billed by how many of those it has to cover, and the procedure code changes with the count.

So a one surface filling might be around $150 to $250 and a three surface filling on a molar can be double that. This is the single most common reason a friend's price does not match yours. When you get an estimate, look for the number of surfaces on the code description and you will usually see where the difference came from.

• One surface: often about $150 to $250
• Two surfaces: often about $200 to $350
• Three or more surfaces: often about $250 to $450 and up
• Front teeth are usually cheaper than molars for the same size

Material matters, and so does where the tooth sits

Silver colored amalgam is the least expensive option and remains durable, though fewer practices place it now and some insurers still base their payment on it. Tooth colored composite costs somewhat more, bonds to the tooth and is what most people choose, especially anywhere visible.

For larger repairs a dentist may suggest an inlay or onlay, a lab made piece cemented into the tooth, priced far closer to a crown at roughly $650 to $1,500. Glass ionomer materials are sometimes used at the gumline or for children. Ask what is being proposed and why that material suits that tooth.

Sometimes the honest answer is that a filling is not enough

When decay has taken out a lot of the tooth, a filling has nothing solid to sit in and the remaining walls can fracture later. That is when a crown, or an onlay, gets suggested instead, and the price jumps to the $800 to $2,000 range.

This is a fair question to ask out loud: what happens if we fill it instead, and what is the risk. A dentist should be able to show you the X-ray and explain what they can see. If the answer feels thin, a second opinion is entirely reasonable and most dentists are used to that.

Insurance usually covers fillings well, but the details bite

Fillings are typically classed as basic restorative work, often covered at around 70 to 80 percent after your deductible. That makes them one of the better covered treatments, and the out of pocket figure is frequently under a hundred dollars in network.

Two details catch people. Some plans pay only the amalgam rate for a back tooth and bill you the difference if you choose composite, which is called an alternate benefit. And out of network, the percentage applies to the plan's allowed amount rather than the practice's fee, so your share is larger. Ask the front desk to run an estimate through your plan before the appointment.

• Ask whether the practice is in network with your plan
• Ask whether an alternate benefit applies to composite on back teeth
• Ask what your deductible is and whether it has been met
• Ask for the estimate in writing with the procedure codes

Why two practices quote the same cavity differently

The main driver is network status. An in network dentist has agreed to a fee schedule with your insurer, which caps what you can be charged for that code. Out of network, the practice sets its own fee. Local costs, appointment length and whether the practice uses a rubber dam and other extras add the rest.

There is also genuine clinical judgment involved. Two dentists can look at the same early cavity and one may recommend watching it with fluoride while the other fills it, and both can be defensible. If you want another look, the directory searches every dental practice in the United States by town or ZIP code and shows the closest first, free and with no account. Bring your X-rays or ask for copies, since they belong to you.

Waiting almost always costs more, not less

Decay does not stop on its own. A cavity that would have been a $200 filling can become a root canal and a crown, which together commonly run past $2,000, and that progression can take months rather than years once it reaches the softer layer under the enamel.

If money is the obstacle, say so plainly at the practice. Many will place a temporary or sedative filling to stabilize the tooth, spread payments, or treat the most urgent tooth first and plan the rest. Dental schools and community health centers also treat at reduced fees. None of those options exist if nobody knows you are struggling.

Frequently asked

This is general information to help you ask better questions, not a diagnosis. Anything happening in your own mouth needs a dentist who can look at it.